Method for processing information in ARPA (automatic radar plotting aid) in radar for digital ship

Abstract

The invention discloses a method for processing information in an ARPA (automatic radar plotting aid) in radar for digital ships. The method comprises the following processing procedures: in each radar scanning period, acquiring a radar pulse signal provided by an upper unit of the radar by an AD (analogue-digital) converter; transmitting the quantized radar pulse signal to an FPGA (field programmable gate array); carrying out the sea clutter process on the quantized radar pulse signal by the FPGA so as to obtain polar coordinate information of each objective ship, and transmitting the polar coordinate information to a DSP (digital signal processor); subsequently converting the polar coordinate information of each objective ship into rectangular coordinate information by the DSP, and transmitting the polar coordinate information of each objective ship and the corresponding rectangular coordinate information to the ARPA; and finally, carrying out the self-adaptive alpha-beta filtering process on each objective ship in the horizontal coordinate direction and the vertical coordinate direction respectively by the ARPA so as to obtain the encountering time and the encountering distance between the ship and each objective ship. The method has the advantage that as a self-adaptive alpha-beta filtering method under a rectangular coordinate system is adopted, the filtering precision is improved effectively, and meanwhile the tracking to maneuvering targets is realized well.

Description

technical field [0001] The invention relates to a radar signal processing technology, in particular to an information processing method in digital marine radar ARPA. Background technique [0002] Marine radar is an important auxiliary equipment for maritime navigation and plays a vital role in early navigation safety. However, due to the frequent occurrence of ship collisions due to the busy sea traffic, only the marine radar can no longer meet the requirements of safe navigation at sea under the new situation. In this case, ARPA (Automatic Radar Plotting Aid) was proposed come out. ARPA is an extension of the function of the marine radar, and the marine radar can be regarded as the sensor of the ARPA system, providing continuous target position information for the ARPA system. The emergence of ARPA has greatly improved the collision avoidance ability of ships. It mainly uses the target position information provided by marine radar and the ship's speed and position informa...

AI Technical Summary

Problems solved by technology

However, since the data filtering in the information processing technology of the traditional ARPA system uses the simplified α-β filtering method in the polar coordinate system or the simplified α-β filtering method in the rectangular coordinate system for filtering processing, this simplified α-β filtering method The β filtering method will produce some errors in filtering the target position information provided by the digital marine radar, which may lead to the failure of target tracking. In addition, the information processing technology of the traditional ARPA system cannot track maneuvering targets.

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